Using the Rhythmbox utility- you can move your music from your Ipod to your computer and also transfer to some other device using USB. The Method is simple-
Use your Linux Operating System ( if you have a Windows PC- you can create a dual booting application using the USB Flash Drive Netbook Remix from http://www.ubuntu.com )
Use Rhythmbox to open your IPod.
Drag and Drop the song from the Rhythmbox playlist to your device/ computer or other device after it is copied.
Note- It is not really advised to illegeally transfer music, as there are better options like streaming music already available. Try http://www.playlist.com and see right margin of the other blog I have for building the playlist using online means- www.dudeofdata.com